foam brush problem

[aca carwash 2]

we have 2 self serve bays. I have recently had the trickle system on for each foam brush and high pressure line
in each bays as the temps have been in the low teens lately. two days ago I noticed pink soap dripping from the ceiling.
I crawled up and fixed the leak in the foam brush line. the next day I noticed that foam brush line wasn't weeping but all the other lines were. I also wasn't getting any product out of the foam brush. I also noticed some product in the air line going to the attic and flushed it out. The foam brush bay that worked was very watery so I assumed the flow jet was going bad and replaced. the bay that was watery was 100% better. The only problem is the foam brush bay not working still doesn't weep and when you put on foam brush selection we get nothing, the flow jet doesn't even pump. Where do I start? Is it something in the weep or maybe a sylenoid or something else. Any suggestions would be appreciated!!!

 

[MEP001]

Start with the basics, unhook the foam brush liquid line from the solenoid and check for flow, work your way up or down the line from there.

 

[aca carwash 2]

Hello MEP, , if I unhook the line from the sylenoid it should shoot out of the block, correct? it doesn't, now what?

 

[MEP001]

Then work backward toward the pump. Check the coil for power, disassemble the solenoid and check the plunger to see if it's stuck, check for blockage.

 

[aca carwash 2]

someone had run over the metal attachment to the top of the foam brush attachment and we couldn't see it because of the plastic piece on the end of the hose that keeps the hose from crimping. process of elimination but I never realized if no product could move the flo jet wouldn't pump. now after 17 years I learn something new again.

Thanks for the reply MEP!!!!!!